Have her car nicked and get it burnt out down the road .. or something equally cute and then tell the local gossip it was you so it gets back to her. Say it was a toss up between her car or her home and then move on!
Wow OP- I used to be at a yard like that, total wack job YO. A lot of it is worryingly similar! Its horrendous that some people get off on a power trip like that. Hope youre much happier at your new yard.